Advertising device

Abstract

An advertising device for use in retail outlets, including a passive infra-red sensing system, a sign bearing a message, and signalling means by which the attention of persons in the vicinity can be attracted, wherein the presence of persons in the vicinity may be detected by the sensing means and said signalling means may be activated to attract attention to the sign.

We claim: 
     
       1. An advertising apparatus comprising: (a) a casing;   (b) a power source arranged in said casing;   (c) passive infra-red detection means arranged within said casing and connected with said power source for detecting the presence of at least one person in an area of detection comprising a substantially triangular field having an apex at said detection means, and an angle of at least 5 degrees at said apex;   (d) display means connected with said casing and said power source, said display means being directed toward said area of detection; and,   (e) control means arranged in said casing and connected with said display means for activating and controlling said display means in response to operation of said detection means,   whereby said display means is operable to display a message to an individual when the individual enters said area of detection.   
     
     
       2. An advertising apparatus according to claim 1, wherein said triangular field has an apex of between 5 degrees and 30 degrees at said apex. 
     
     
       3. An advertising apparatus according to claim 1, further including mounting means for mounting said casing on a support, said mounting means being operable for mounting and dismounting said casing only from within said casing, said casing comprising a wall which can be removed from said casing to provide access to said mounting means, said wall being mountable on said casing by means of spring clips which cooperate with catches inside said casing to lock said wall on said casing, said casing being provided with apertures through which apertures a releasing device can be inserted to release said spring clips from said catches.